2021 ICD-10-CM Code O36.2

Maternal care for hydrops fetalis

Version 2021
Non-Billable Code

Not Valid for Submission

O36.2 is a "header" nonspecific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of maternal care for hydrops fetalis. The code is NOT valid for the year 2021 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Short Description:Maternal care for hydrops fetalis
Long Description:Maternal care for hydrops fetalis

Code Classification

Specific Coding for Maternal care for hydrops fetalis

Header codes like O36.2 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for maternal care for hydrops fetalis:

  • O36.20 - ... unspecified trimester
  • O36.20X0 - ... unspecified trimester, not applicable or unspecified
  • O36.20X1 - ... unspecified trimester, fetus 1
  • O36.20X2 - ... unspecified trimester, fetus 2
  • O36.20X3 - ... unspecified trimester, fetus 3
  • O36.20X4 - ... unspecified trimester, fetus 4
  • O36.20X5 - ... unspecified trimester, fetus 5
  • O36.20X9 - ... unspecified trimester, other fetus
  • O36.21 - ... first trimester
  • O36.21X0 - ... first trimester, not applicable or unspecified
  • O36.21X1 - ... first trimester, fetus 1
  • O36.21X2 - ... first trimester, fetus 2
  • O36.21X3 - ... first trimester, fetus 3
  • O36.21X4 - ... first trimester, fetus 4
  • O36.21X5 - ... first trimester, fetus 5
  • O36.21X9 - ... first trimester, other fetus
  • O36.22 - ... second trimester
  • O36.22X0 - ... second trimester, not applicable or unspecified
  • O36.22X1 - ... second trimester, fetus 1
  • O36.22X2 - ... second trimester, fetus 2
  • O36.22X3 - ... second trimester, fetus 3
  • O36.22X4 - ... second trimester, fetus 4
  • O36.22X5 - ... second trimester, fetus 5
  • O36.22X9 - ... second trimester, other fetus
  • O36.23 - ... third trimester
  • O36.23X0 - ... third trimester, not applicable or unspecified
  • O36.23X1 - ... third trimester, fetus 1
  • O36.23X2 - ... third trimester, fetus 2
  • O36.23X3 - ... third trimester, fetus 3
  • O36.23X4 - ... third trimester, fetus 4
  • O36.23X5 - ... third trimester, fetus 5
  • O36.23X9 - ... third trimester, other fetus

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code O36.2:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code O36.2 are found in the index:

Information for Patients


Also called: Dropsy

Edema means swelling caused by fluid in your body's tissues. It usually occurs in the feet, ankles and legs, but it can involve your entire body.

Causes of edema include

To keep swelling down, your health care provider may recommend keeping your legs raised when sitting, wearing support stockings, limiting how much salt you eat, or taking a medicine called a diuretic - also called a water pill.

[Learn More]

Fetal Health and Development

A normal pregnancy lasts nine months. Each three-month period of pregnancy is called a trimester. During each trimester, the fetus grows and develops. Regular medical checkups and prenatal tests are very important. They can

Besides getting medical care, there are other things you can do to keep your baby as healthy as possible. It's important not to drink or smoke. Try to eat a healthy diet and make sure to take care of any health problems you have during pregnancy.

[Learn More]

Rh Incompatibility

There are four major blood types: A, B, O, and AB. The types are based on substances on the surface of the blood cells. Another blood type is called Rh. Rh factor is a protein on red blood cells. Most people are Rh-positive; they have Rh factor. Rh-negative people don't have it. Rh factor is inherited through genes.

When you're pregnant, blood from your baby can cross into your bloodstream, especially during delivery. If you're Rh-negative and your baby is Rh-positive, your body will react to the baby's blood as a foreign substance. It will create antibodies (proteins) against the baby's blood. These antibodies usually don't cause problems during a first pregnancy.

But Rh incompatibility may cause problems in later pregnancies, if the baby is Rh-positive. This is because the antibodies stay in your body once they have formed. The antibodies can cross the placenta and attack the baby's red blood cells. The baby could get Rh disease, a serious condition that can cause a serious type of anemia.

Blood tests can tell whether you have Rh factor and whether your body has made antibodies. Injections of a medicine called Rh immune globulin can keep your body from making Rh antibodies. It helps prevent the problems of Rh incompatibility. If treatment is needed for the baby, it can include supplements to help the body to make red blood cells and blood transfusions.

NIH: National Heart, Lung, and Blood Institute

[Learn More]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)